For some real number a and some positive integer n, the first few terms in the expansion of (1 + ax)^n are
1 + 10x + 150 x^2 + cx^3 + ...
Find c.
1 answer
c = n(n-1)(n-2)a^3/6
1 + 10x + 150 x^2 + cx^3 + ...
Find c.
1 answer